Mohd Nur Izzuddin Rosman, Siti Aida Ibrahim, Ainun Rahmahwati Ainuddin, and Niki Prastomo. 2025. “Synthesis and Characterization of Cinnamon Bar Soap from Waste and New Cooking Oils: A Comparative Study”. International Journal of Integrated Engineering 17 (8): 13-25. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/24078.